How big is a 6mm diamond?

A 6mm diamond has a diameter of approximately 6 millimeters, which is about 0.24 inches. This size is often considered to be a medium-sized stone, suitable for various types of jewelry, including engagement rings. In terms of carat weight, a 6mm round diamond typically weighs around 0.80 to 1.0 carats, depending on its cut and proportions.